BlockCypher

BlockCypher is a blockchain web services platform founded in 2013 by Catheryne Nicholson and Matthieu Riou in Redwood City, California. The platform provides a simple, mostly RESTful JSON API for interacting with multiple blockchains — including Bitcoin, Ethereum, Litecoin, Dash, and Dogecoin — accessed over HTTP or HTTPS. BlockCypher enables developers and companies to build blockchain applications without managing blockchain infrastructure themselves, abstracting away node operation, sync, and reliability concerns. The platform supports features including address generation, transaction creation and broadcasting, webhook notifications for on-chain events, and a confidence factor API for unconfirmed transactions. BlockCypher also operates its own test chain for developer experimentation.